Wrench.



E. J. WASBROAD.

WRENCH.

APPLICATION FILED All. 6. 1908.

Patented Dec. 1, 1908.

m s @W UNITED STATES PATENT OFFICE.

ERNEST JOSEPH WASBROAD, OF MONTREAL, QUEBEC, CANADA, ASSIGNOR OF ONE-HALF TO STANDARD METAL COMPANY LIMITED, OF MONTREAL, CANADA, A CORPORATION OF CANADA.

WRENCH.

Specification of Letters Patent.

Patented Dec. 1, 1908.

To all whom it may concern:

Be it known that I, ERNEST JOSEPH WAS- BROAD, a subject of the King of Great Britain, residing at 17 3 Canning street, in the city and district of Montreal, in the Province of Quebec, in the Dominion of Canada, have invented certain new and useful Improvements in Wrenches, of which the following is a specification.

The invention relates to improvements in wrenches, as described in the present specification and illustrated by the accompanying drawings that form part of the same.

The invention consists essentially in the novel arrangement and construction of parts whereby the sliding grip member is held rigidly to its gripping position by a pivoted dog, spring-held therefrom.

The objects of the invention are to devise a wrench of very simple construction, easy to operate with one hand of the user if required, and to produce a tool of the class described at a very cheap cost and yet of a very durable nature.

Figure 1 is a perspective view of a wrench showing my invention applied to a form of double wrench. Fig. 2 is a sectional view of the sliding grip member showing a plan view of the arrangement of dogs and a portion of the stem with the wrench.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawin s, 10 is the stem having the parallel rows 0 ratchet teeth 11 and 12 arranged on each side of said stem.

13 is a sliding grip member.

15 is a pawl having a corrugated head forming the pipe grip 14 and the toothed end 16 adapted to engage the ratchet teeth 11, said pawl 15 is pivoted in the ears 17 projecting from one side of the sliding grip member 13, said head or pipe grip 14 being springheld from the body of the said sliding member 13 by the spirals ring 18. 19 is a dog or pawl pivoted in suitable lugs projecting from the other side of the sliding member 13 and having its head s ring held from the body of said sliding mem er between said lugs and a grip member integral with said sliding member and coacting with a permanent grip projecting from theend of the from the opposite side of the stem 10 from the permanent grip member 20 and formed with an angular recess for gripping pipes.

The precise form of dog described and of the spring-held arrangement is not absolutely essential to the construction of this wrench, as there may be modifications of the same without departing from the spirit of my invention, the salient features being the arrangement of a spring-held pivoted dog in the sliding grip member and the cutting of the ratchet teeth on the stem, so that the said dog may act as a retaining pawl in the gripping position of the wrench members.

in the o eration of the wrench, the sliding grip mem er is slid along the stem away from the outer grip member by pressing the thumb on the heads of the spring-held dogs or pawls, thus releasing the said pawls from engagement with the teeth of the ratchet. An outer grip member is then placed in position on the work and the sliding grip member slid up to the work, the thumb being removed from the dogs or pawls, for the teeth of the pawls will slide from tooth to tooth of the ratohets and as the grip prong of the sliding grip member tightens on the work, the teethof the dogs or pawls fall in place to their particular retaining teeth in the ratchets and the wrench is then handled in the usual manner, in removing the wrench from the work, the awls are pressed in the same way and the s iding member slid away from said work, the same operation being constantly re eated.

It will readily be seen that in this wrench, the work may be done very quickly, as in handling the wrench, the workman will become very proficient in sliding inwardly and outwardly the said sliding grip member, thus rendering it quite unnecessary to take such long turns in the tightening of any nut or bolt.

What I claim as my invention is:

In a wrench, a stem having correspondin ratchet teeth formed on opposite faces an rigid aw members at the end thereof, a sliding member mounted thereon, and pawls in the Province of Quebec, in the Dominion givoted in said sliding member and springof Canada, this 17th day of March, 1908.

eld at their heads fIOIllSLld member for en- ERNEST JOSEPH WASBROAD gagement at their toothed ends coincidently 5 with each of said toothed faces, one of said Witnesses:

awls forming a jaw member. G. H. TRESIDDER,

Signed at the city and district of Montreal, HARRY DAVIS. 

